Package liner



Nov. 8, 1960 FIG. I

FIG. 4

H. E. ENGLESON ETAL 2,959,335

PACKAGE LINER Filed Aug. 30, 1956 28 INVENTORS:

HARRY E. ENGLESON 29 ELMER o. SRAMEK ATT'YS 811211168 Patd t PACKAGELINER Harry E. Engleson, Chicago, and Elmer D. Sramek, Cicero, Ill.,assignors to F. B. Redington Co., Chicago, 111., a corporation ofDelaware Filed Aug. 30, 1956, Ser. No. 607,131

4 Claims. (Cl. 229-14) This invention relates to a package and method ofmaking same, and more particularly to a package in the form of a lineradapted to be received within a cardboard container or the like, whereinthe liner is constructed of a flexible laminated material in the form ofa tubular sleeve having the opposite end portions closed, therebydefining a moistureproof and an hermetic liner.

The present invention is particularly useful in connection with thepackaging of candied popcorn and the like, and other perishablecommodities which may be kept fresh in an airtight and moistureproofpackage.

In the present invention, a tubular sleeve, rectangular in crosssection, is formed from a sheet of laminated material having an aluminumfoil ply and a waxen paper ply bonded together. This material is knownas Reyseal. The tubular sleeve is provided with a longitudinalheat-sealed seam along one of the broad faces and folded over at theopposite ends so that the waxen ply contacts another portion of thewaxen ply or the waxen ply contacts the foil ply. Application of heat tothe folded end portions closes the ends in a moistureproof and airtightrelationship.

Accordingly, it is an object of this invention to provide an improvedpackage and method of making same which is airtight and moistureproof.

Another object of this invention is in the provision of a package forcontaining perishable commodities that is constructed of a laminatedmaterial having a foil ply and a waxen paper ply, wherein the ends ofthe package are folded in such a manner that the waxen ply eithercontacts another portion of the waxen ply or a portion of the foil plyto define a moistureproof and airtight sealed package.

Still another object of this invention resides in the provision of aliner adapted to be received in a cardboard container havingmoistureproof and airtight closures at each end thereof which may besimply and readily constructed at low cost.

Other objects, features, and advantages of the invention will beapparent from the following detailed disclosure, taken in conjunctionwith the accompanying sheets of drawings, wherein like referencenumerals refer to like parts, in which:

Fig. 1 is a perspective view having some portions broken away of atubular sleeve which illustrates the first step in forming thisinvention;

Fig. 2 is a fragmentary view of the bottom end of the sleeve in Fig. 1illustrating the next step of folding inwardly an end flap;

Fig. 3 is a fragmentary view similar to Fig. 2, but illustrating thenext step performed in fashioning the end enclosure of the liner of theinstant invention; and

Fig. 4 is a fragmentary perspective view of the completed end closure ofthe liner of the instant invention.

Referring to the drawing and particularly to Fig. 1, a tubular sleeve1410f rectangular cross section is illustrated which comprises broadsides 11, 11 and narrow sides 12, 12. This tubular sleeve is constructedfrom a sheet of acompletely sealed end closure.

Patented Nov. 8, 1960 laminated material, know as Reyseal which includesan aluminum foil ply 13 bonded to a waxen paper ply 14 for defining acomposite sheet. Reyseal is characteristic in that upon application ofheat, the paper ply will seal on the foil ply or the paper ply will sealon the paper ply, but the foil ply will not seal on the foil ply. And,it may be formed in the conventional manner, wherein opposite ends 15and 16 are brought into overlapping relationship along one of thesebroad sides. It will be noted that the tubular sleeve is formed so thatthe waxen ply 14 is innermost with the foil ply 13 being on the outside.

In overlapping the ends 15 and 16, it is seen that the foil ply of theend 16 is in engagement with the waxen paper ply of the end 16. Heat isapplied along these overlapping ends in order to seal them together anddefine a longitudinally extending seam 17.

In closing the open end, panels 21, 22 are folded inwardly along theline 23 until they are positioned normal to the broad side 11, as shownin Fig. 2. In making this fold, a portion of the side extensions 18 and20 are folded upon themselves so that diagonal creases 24 and 25 areformed. Thus, a portion of the innermost paper ply of each sideextension is folded over into engagement with another portion thereof.The front extension 19 is then folded inwardly in overlappingrelationship with respect to the panels 21, 22 until the extension isnormal to the broad side 11, as seen in Fig. 3. This operation alsocauses a portion of the side extensions 18 and 19 to be folded inwardlyand in overlapping position with other portions of these sideextensions, wherein diagonal creases 26 and 27 are defined. Now,triangularly shaped sections or tabs 28 and 29 are defined by thefolding operation.

In folding the front extension 19 over panels 21, 22, the innermostwaxen paper ply 14 of the extension contacts the outermost foil plies ofthe panels 21, 22 defining paper to foil contact. With respect to theside extensions, a portion of the inner waxen ply of the extensions willcontact a portion of the inner waxen ply of other portions of theextensions and the outer foil ply of the already folded over portions ofthese extensions. Thereafter, heat is applied to the folded portions inorder to adhesively seal all of the folds together and define amoistureproof and hermetic end closure. Thus, it is seen that the entirepackage is completely sealed along the longitudinal seam and at each endthereof with portions of the waxen ply contacting the foil ply or theportions of the waxen ply. The triangular projections or tabs 28 and 29may then be folded inwardly against the overlapping folded extensions,as shown in Fig. 4, to define A thermoplastic or a hot melt adhesive maybe applied to the inner faces of the triangular tabs 28 and 29 in orderto secure them in position against the overlapping extension.

From the foregoing, it will be appreciated that the present inventionprovides a liner of laminated material including an aluminum foil plyand a waxen paper ply which is folded in such a manner so that theentire package is completely sealed with paper against foil or paperagainst paper in order to provide a moistureproof and hermetic liner.

It will be understood that modifications and variations may be effectedwithout departing from the scope of the novel concepts of the presentinvention, but it is understood that this application is to be limitedonly by the scope of the appended claims.

The invention is hereby claimed as follows:

1. A relatively flexible walled liner adapted to be received in acontainer constructed of stiffer material, said liner being formed froma composite sheet of laminated material having an outer ply of aluminumfoil and an inner ply of waxen paper bonded to said foil, said linercomprising an elongated rectangular in cross section tubular memberhaving opposing broad and narrow side portions and a folded and sealedclosure at each end thereof, each closure including an inner flapconnected to one of said broadside portions, an outer flap connected tosaid other broad side portion and in overlapping sealed relationship tosaid inner flap so that the paper ply of said outer flap contacts thefoil ply of said inner flap in hermetic and moistureproof relationship,and multi-layer triangular tabs connected to said opposite narrow sideportions and overlapping said inner and outer flaps, said multi-layertabs including paper plies directly contacting and bonded to paper andfoil plies.

2. A method of making a container which comprises providing a compositesheet of laminated material having an outer ply of aluminum foil and aninner ply of waxen paper bonded thereto, folding said sheet in the formof an elongated tube rectangular in cross section with the paper plyfacing innermost thereby defining two broad sides and two narrow sides,bringing the longitudinally extending free marginal edges of saidmaterial in faceto-face relationship with the paper ply overlapping andcontacting the foil ply, applying heat to said marginal edges to providea longitudinal seam for said tube which is hermetically sealed, foldingthe marginal edge of one of said broad sides at each end of said tubeinwardly at right angles to said broad side causing adjacent connectedportions of said narrow sides to fold over part of the remote portionsthereof to place the paper plies of said portions in face-to-facecontact, folding the marginal edge of said other broad side at each endof said tube inwardly at right angles to said broad sides in overlappingposition to said first inwardly folded edge so that the paper ply of theformer contacts the foil ply of the latter, and causing the adjacentconnected portions of said narrow sides to fold over the remote portionsthereof and the already folded portions to place the paper plies of saidconnected portions in contact with the paper ply of said remote portionsand the foil ply of said already folded portions wherein triangular tabsare formed, applying heat to said folded end portions to bond the paperagainst paper plies and the paper against foil plies and definemoistureproof and hermetically sealed folded end portions, and foldingover the triangular tabs against the folded broad sides.

3. A relatively flexible walled liner adapted to be received in acontainer constructed of stiffer material, said liner being formed froma composite sheet of laminated material having an outer ply of aluminumfoil and an inner ply of waxen paper bonded to said foil, said linercomprising an elongated rectangular in cross section tubular memberhaving opposed side portions and a folded and sealed closure at each endthereof, each closure ineluding an inner flap connected to one of saidside portions and an outer fiap connected to the side portion opposedthereto and in overlapping sealed relationship to said inner flap sothat the paper ply of said outer flap contacts the foil ply of saidinner flap in hermetic and moistureproof relationship, and multi-layersubstantially triangular-shaped tabs connected to other opposite sideportions and overlapping said inner and outer flaps, said multi-layertabs including paper plies directly contacting and bonded to paper andfoil plies.

4. A method of making a container which comprises providing a compositesheet of laminated material having an outerply of aluminum foil and aninner ply of waXen paper bonded thereto, folding said sheet in the formof an elongated tube rectangular in cross section with the paper plyfacing innermost thereby defining two pairs of opposed sides, bringingthe longitudinally extending free marginal edges of said material inface-to-face relationship with the paper ply overlapping and contactingthe foil ply, applying heat to said marginal edges to provide alongitudinal seam for said tube which is hermetically sealed, foldingthe marginal edge of one of the sides of one pair of opposed sides ateach end of the tube inwardly at right angles to said side causingadjacent connected portions of said other pair of sides to fold overpart of the remote portions thereof to place the paper plies of saidportions in face-to-face contact, folding the marginal edge of saidother of the sides of said one pair of opposed sides at each end of thetube inwardly at right angles to said side in overlapping position tosaid first inwardly folded edge so that the paper ply of the formercontacts the foil ply of the latter, and causing the adjacent connectedportions of said other pair of sides to fold over the remote portionsthereof and the already folded portions to place the paper plies of saidconnected portions in contact with the paper ply of said remote portionsand the foil ply of said already folded portions wherein substantiallytriangularlyshaped tabs are formed, applying heat to said folded endportions to bond the paper against paper plies and the paper againstfoil plies and define moistureproof and hermetically sealed folded endportions, and folding over the tabs against the folded said one pair ofsides.

References Cited in the file of this patent UNITED STATES PATENTS1,398,840 Conley Nov. 29, 1921 2,152,323 Moore Mar. 28, 1939 2,227,787Laufer Jan. 7, 1941 2,430,459 Farrell et al Nov. 11, 1947 2,474,619Farrell et al. June 28, 1949 2,603,046 Paulsen July 15, 1952 2,658,662Paulsen Nov. 10, 1953

